For those not familiar with the Unix references in the rap, sometimes you need to stop a runaway program. On a Windows machine, you'd use the process manager (the thing that pops up when you hit ctrl-alt-del on newer Windows versions). On Unix, you use a command called "kill." There are various forms of kill that have different levels of severity.
- The normal "kill" will send a "terminate" signal asking the program to stop running. The program may ignore the signal.
- "kill -1" sends a "hang up" signal. Some programs will respond to this signal by reconfiguring or restarting themselves.
- "kill -9" tells the operating system "do whatever it takes to shut this program down now." It does not give the program time to react. It simply takes the program down immediately.